WFS 2.0.0 getFeature srsname

[jnicho02]

In WFS 2.0.0 there is no srsname parameter in the getfeature call.

Comparing wfs110.py to wfs200.py it doesn't seem hard to implement, but was it intentionally left out?

[github-actions]

This Issue has been inactive for 90 days. In order to manage maintenance burden, it will be automatically closed in 7 days.

[jnicho02]

I sincerely hope that the PR that fixes this small, yet significant, problem will make it through. This issue forced me to delist OWSLib from the set of libraries our Devs can use.

[geographika]

Fixed with #945